Emery-cloth



her AVAILABLE are ATENT ICED L EMERY GLOTH.

SPEC IFICATION forming To all whom it may concern: 5e it known that I,FREEMAN K. SIBLEY, of \Valtham, in the county of llliddlcsex and Stateof Massachusetts, have invented certain improvements in 1] l!\0l \'-Gl0tl|, and in the mode of manufacturing the same; and i do herebydeclare that the following is a full, clear, and exact descriptionof-the same.

The invention relates to a mixture of abrasive materials aml cementapplied to the chiciycloth to be used for grinding and polishing, and toa method of mixing and applying the abrasive materials and cementto suchemerycloth.

ihe term cloth is herein employed in a broad sense to denote anyflexible materialwhether leather, paper, cloth, or othersubstancc-'-which can be made to serve as a polishing-belt or beattached to the. surface of a polishing-wheel. r

The abrasive materials employed are emery and eorundum of suitablefineness for the work to be peribrmcd by the finished emery-cloth. Theproportions used are generally two-thirds emery and one-third cornndum,both proportions beingdctermined by weighin The advantageattained bysuch admixture is thatgrinding and polishing may be performed in asingle operation instead of in succcssive operations, as heretofore, thecoru'ndum performing the work of removing the bulk of the material to beground oil, and the softer and finer cutting emery simultaneouslyoblitcrating-the seratclrmaiks otherwise left on the work bythecornndum. "A very much smoother linish is thus obtained in a singleoperation and in a given time than can be obtained with a cloth armedwith either corundnm or emery alone...

The cement I employ is made of a solution of glue and silicate of soda.which has'been sold in the general market under the names 'lenexinc andGiant Adhesive. Silicate of soda made in a more imperfect manner and ofinferior quality will more or less imperfectlyanswer the purpose; butthe kind named ,l

have found to be far superior to any other for the manufacture ofpolishing-belts, as itforms with the glue, when applied as hereinafter,described ,a remarkably adherent, tough, and du- .materials separate]but part of Letters Patent 310 230,202, dated July 20, 1880, Applicationfiled April 10, 1880. (NomodcL) I rable cement, which impairs theflexibility of the fabric scarcely at all. By the employment oi thiscement I therefore secure the important advantage of agreat increase offlexibility in polishing-belts, which, so far as 1 am aware, has neverbefore been attained or even appreached, although this very much desiredquality has continually been sought for by manuiacturers of emery-cloth.

The preferred proportions of the glue and silicate of soda of the kindnamed above are one part, by weight, of the silicate andfonr variedsomewhat without materially affecting the quality of the emery-cloth;and I do not therefore confine myself strictly to these proparts ofglue; but these proportions may be portions; neither do I confine myselfstrictly to the proportions named above for the ad mixture of the emeryand corundum, as these may be somewhat and advantageously varied,according as the polishing effect is required for various purposes to.be equal to, greater, or less than the grinding effect.

The mode of applying the materials is as follows: .The glue is firstreduced to. a liquid state by water and heath! the ordinary way.

Then the Ten'exine or Giant Adhesive is added to the hot glue andthewhole is kept heated. kept in the heated state the emery and corundumare added, sufiicient' water being in- While these materials so mixedare corporated' in the mixture to bring the whole to the consistency ofpaint. The' mixture is then applied to the cloth by brushes while hot,care being taken to work the mixture very thoroughly into the surface,towhich it is applied by r'ubbingwith the brush. The cloth is thenplaced aside to allow the drying and hardening of the cement, afterwhich emery-cloth is ready for market.

I am aware that cold silicate of soda and hot glue have been separatelyused heretofore as cements inapplying abrasive materials to surfaces.Therefore I do notclaim either of these \Vhat Ido claim as my invention.and desire to secure by Letters Patent, is as follows: -l.' F lcxil lematerials or fabrics for grinding or polishingpurposeseomposedofcloth,rleathor, paper, orother flexible material and a coat- 2. The modeof producing an'abrasive coat- 5 mg upon flexible material, whichconsists m first preparing liquid ,e'lne by the amof water and heat;sevend, mixing: therewith silicate of soda, substantially in theproportions de-= scribed; ,l-hird, incorporating with the mixture 10 soformed, and while hot, emery and cornndmn lied.

mixed, in proportions substzmtially as set forth till the whole mixtureattains the consistency of paint; and, lastly, applying the hot mixturewith a brush and working the same into the surface tohe c0uted,allsubstantially as speci- FREEMAN K. SIBLEY. Witnesse.

THOMAS C. llunmum,

.] AMES'T. WELLINGTON.

